Quite the BS. Sasuke wasn't given a nerfed rinnegan. Both powers require time to fully understand, use, and master.
IE: Naruto wasn't sure he could heal Kakashi and when he did he wasn't sure how he did it. While Saske easliy understood how to use his rinnegan genjutsu and use it in an instant.
The rinnegan allowed Sasuke to instantly see the limbo clones while it took Naruto time to fully sense them.
Naruto held back against Sasuke. Sasuke would attack and then Naruto would use just enough power to counter his attack. If Naruto would have full understanding of his rsm or used all the tail beast chakra the battle would have been over quickly.
Not really, I'd agreed if Naruto RSM was also nerfed, like it would increase only strength but not speed, or let's say it would grant him like only 2 TSB instead of i think standard are 9 or 10. Yet Naruto RSM was working as it should be, in opposite to Sasuke's rinnegan which didn't grant him all the abilities it normally does, more like he got 1/3.
Naruto healing Kakashi's eye is already a feat and display of his new powers, he doesn't really need to know how it's working, as long as he can do it.
Sasuke didn't use rinnegan genjutsu, it was a normal sharingan genjutsu he used through his rinnegan, since his rinnegan kept all his sharingan powers as've seen. Yes maybe it was amplified by his Rinnegan or it's chakra, still he didn't use any new jutsu there, it was sharingan genjutsu.
"Rinnegan allowed Sasuke to instantly see the limbo clones"
Obviously, that's how dojutsu or eyes works in general. Naruto didn't have such eyes, but he's sensing ability allowed him to fight with limbo clones anyways. Also I don't remember if it really took Naruto time to sense them, I think once Sasuke said that he can clearly see another Madara, Naruto told him he can't but he can sense him, you may provide scans if im wrong.
Anyways this fact doesn't really matter, I mean the vision his Rinnegan provided wasn't really useful in his fight against Naruto, while Naruto's enchanted RSM sensing allowed him to half-react to ameno.
Naruto wasn't holding back, cuz he was fighting for his life. You don't hold back when fighting for you life, unless you want to die. If Naruto tried to attack, Sasuke could also counter his attacks, not a big deal.
"If Naruto would have full understanding of his rsm or used all the tail beast chakra the battle would have been over quickly."
That's was I've been saying, he was given much more powers than Sasuke. Sasuke knew this and that he had to do something about this, so he simply took away bijuu's.
Naruto got a fully working RSM, was a jinchuuriki of the strongest bijuu's and if that's not enough, he could also lend chakra and power from other 8 bijuu's, Sasuke did the right thing, by taking bijuu's away, he tried to make it equal.